Tennyson is biracial, making it more difficult for her to find a match. A spokesperson for Be the Match said it means she has less than a 14% chance of finding a match. She ideally needs a biracial donor. That's why Dell Children's is holding a Donor Registry Drive for her on Friday, Nov. 15.

Doctors diagnosed Tennyson with leukemia when she was 13 years old. She's now 21. The four-time cancer survivor recently got into her dream school – The University of Texas.

PHOTOS: Austin woman hopes to find bone marrow match to go back to UT

1/6

Lizzie Tennyson

2/6

Lizzie Tennyson

3/6

Lizzie Tennyson

4/6

Lizzie Tennyson

5/6

Lizzie Tennyson

6/6

Lizzie Tennyson

1/6

Lizzie Tennyson

She was set to start this fall, but just six weeks ago she found out her cancer came back and had to drop out. She's now undergoing chemo for the fifth time, and she said she desperately needs a bone marrow that's free of cancer to end this cycle.

“With it having such blatant chances of coming back, I can’t be sure this time around it’s not going to come back again," said Tennyson. "The only known cure is a transplant, so it’s really important that I get one.”

“We definitely want to encourage everyone to come and swab and even if you’re not biracial just come and swab on Friday with us,” said Brenda Garza, with GenCure and Be the Match.